I think you guys mean "ma" not "mAH". The "ma" is small unit of current flow. The "mah" is a small unit of battery capacity.

Edit: Using their 650 ma number, you could fly for two hours on a 1300 mah battery (650ma x 2 hr). Using TOM's number which is probably more realistic since we don't fly at 10000 RPM all the time...or at all for that matter, 400-450 ma x 2 hr is 800-900 mah. So that's why a 1000 mah battery is plenty on a single. I have a 1500 mah NiMh and it's way way more than I need but it only weighs 3.4 ounces. No big deal.